<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<html>
  
<!-- Mirrored from bos.asmhackers.net/docs/filesystems/ntfs/bitmap2.html by HTTrack Website Copier/3.x [XR&CO'2013], Tue, 07 Oct 2014 11:26:07 GMT -->
<head>
    <title>NTFS Documentation: Bitmap Attribute</title>
  </head>

  <body>
      <h1><a href="index-2.html#NTFS" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/index.html#NTFS">NTFS</a> Documentation: Bitmap <a href="attribute.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html">Attribute</a></h1>

      <h2>Definition</h2>

      This <a href="attribute.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html">file attribute</a> is a sequence of bits where each bit represents the status of an entity.
      <p>

      <h2>Layout of the <a href="attribute.html#stream" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html#stream">stream</a></h2>

      As far as we know, this <a href="attribute.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html">file attribute</a> is currently used in two ways:
      <p>

      <ul>
        <li>for indexes (e.g. <a href="dir.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/dir.html">directories</a>). Each bit represents a <a href="attribute.html#VCN" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html#VCN">VCN</a> of the <a href="indexallocation.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/indexallocation.html">index allocation attribute</a>, starting at <a href="attribute.html#VCN" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html#VCN">VCN</a> 0. The bit is set when the <a href="attribute.html#VCN" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/attribute.html#VCN">VCN</a> is used by an <a href="INDX.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/INDX.html">index buffer</a>.
        <p>

        <li>for the <a href="MFT.html" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/MFT.html">MFT</a>. Each bit is a copy of the <a href="FILE.html#in_use_flag" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/FILE.html#in_use_flag">in-use flag of a FILE record</a>, starting at <a href="MFT.html#file_record_number" tppabs="http://www.via.ecp.fr/~regis/ntfs/new/MFT.html#file_record_number">FILE record number</a> 0.
        <p>

      </ul>
      <p>

      <hr>
      <address><a href="mailto:regis@via.ecp.fr">Regis Duchesne</a> at <a href="javascript:if(confirm('http://www.via.ecp.fr/  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.via.ecp.fr/'" tppabs="http://www.via.ecp.fr/">VIA</a>, <a href="javascript:if(confirm('http://www.ecp.fr/  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.ecp.fr/'" tppabs="http://www.ecp.fr/">ECP</a>, France</address>
<!-- Created: Mon Dec  9 17:35:20 MET 1996 -->
<!-- hhmts start -->
Last modified: Sun Feb 14 15:34:15 PST 1999
<!-- hhmts end -->
  </body>

<!-- Mirrored from bos.asmhackers.net/docs/filesystems/ntfs/bitmap2.html by HTTrack Website Copier/3.x [XR&CO'2013], Tue, 07 Oct 2014 11:26:07 GMT -->
</html>
